Band brake



G. J., THOMAS BAND BRAKE Filed May 2,

Patented Jan. 22, 1929.

UNITED STATES PATENT OFFICE.

GEORGE JOSEPH THOMAS, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BAND BRAKE.

Application led May 2, 1925. Serial No. 27,375.

This invention relates to brakes. and is illustratedv as embodied in an automobile brake. An object of the invention is to provide an inexpensive construction, by using a band instead of formed shoes, while guarding against the tendency of a flexible band to lock itself, by making the band of relatively heavy material in a plurality of sections which may be regarded as semi-flexible shoes.

Important features of the invention relate to anchoring two of these sections atfadjacent ends with the anchor of each between the ends of the other, to give the effect of overlapping thc shoes, and to pivotally connecting two or more sections, so that they may successfully be used when extended beyond 180 degrees.

These and other objects and features of the invention, including various novel combinations of parts and desirable particular constructions, will be apparent from the following description of one illustrative embodiment shown in the accompanying drawings, in which:

Fig. 1 is a vertical section through the brake just inside the wheel,'showing the band in side elevation;

Fig. 2 is a bottom view of one of the. camengaging endsl of the band;

Fi 8 is an inside plan view of the anchored cnd of the center section of the band; and

Fig. 4 is an inside plan view of the pivoted end of one of the end sections of the band.

l'n the, arrangement selected for illustration. the invention comprises a drum 10Within which is an cxpansible band in three sections 12, 14, and 16. Sections 12 and 16 are identical and interchangeable.

Each of the sections 12 and 16 has its free end turned radially and supported by a pair of stampings or brackets 18 (Fig. 2), the radial ends of the sections engaging a double cam 20. Stampings 18 may be made with slotted openings 22 for stationary posts supporting a plate crossing the end of the cam 20. and confining the ends of the band sections laterally (see Patent No. 1,604,394, granted October 26, 1926. to Bendix Brake Company on an application filed by A. Y. Dodge). At the other end vof each shoe 12 and 1G is secured a stamping bent to provide a pair of a rms 24, shown as having tubular projections 2G sleeved upon an anchor 28. for section 12, or upon a pivot 30 connecting section 1G to a U-shaped stamping secured to section 14.

Section 14 has its ends bent together at 3 described in detail, it is not my intention to limit the. scope of the invention to that particular embodiment, or otherwise than by the terms of the'appended claims.

I claim:

1. A brake comprising, in combination, a

drum, a friction band adjacent the drum formed in a plurality of flexible sections, i

means for anchoring tWo of the sections at adjacent ends with the end of each anchored between the ends of the other, and means forcing the ends of the band in opposite directions for forcing the sections against they drum.

2. A brake comprising, in combination, a drum, a friction band adjacent the drum formed in a. plurality of flexible sections, the end of one section being anchored and being narrowed adjacent the anchor, the end of the adjacent section having a pair of arms straddling the narrowed part of the other and anchored between the ends of the other, and means engaging the 4ends of the band for forcing the sections against the drum.

3. A brake comprising, in combination, a drum, a support at the open side of the drum, an expansiblc friction band in a plurality of flexible sections arranged Awithin the drum,- a pair of anchors for adjacent ends of said sections carried by the support, the anchor ot each section being between the ends of the other section, and means acting on the ends of the band for expanding the hand against the drum.

4. A brake comprising, in combination, a drum,a fiat friction 'band Within the drum, the band being in a plurality of flexible sections, means for anchoring adjacent ends of two of said sections. a pivot connecting a third section to one of the anchored sections, and means. for` expanding the band against the. drum.

A brakey comprising, in combination, a

drum. a flat friction band within the drum,

the band being in a plurality of flexible scc-I tions, means for anchoring adjacent ends of sides bent together adjacent one end to form 10 A tWo of said sections, the anchor for each seca radial part, said part being perforated to tion being between the ends of the other secreceive an anchor pvot. v

tion. 8. A friction band section having secured 6. A Hat friction band section having its at its end a stamping formed with parallel sides bent together adjacent one end to form arms arranged to be pivotcd on an anchor. l5

a radial part, said part being constructed and In testimony whereof I have hereunto arranged to be pivotally anchored. signed niv naine.

7. A flat friction band section having its GEORGE JOSEPH THOMAS. 

